<style>
    #booking-menu{background-color: #59de69;}
</style>
<div id="subnav">
    <div><a id="bmenu1" href="<?=$this->baseUrl()?>/backend/booking/unapproved">Unapproved Booking</a></div>
    <div><a id="bmenu2" href="<?=$this->baseUrl()?>/backend/booking/unpaid">Unpaid Booking</a></div>
    <div><a id="bmenu3" href="<?=$this->baseUrl()?>/backend/booking/completed">Completed Booking</a></div>
    <div><a id="bmenu4" href="<?=$this->baseUrl()?>/backend/booking/canceled">Canceled Booking</a></div>
</div>
<?php echo $this->layout()->content; ?>